USING PYTHON 3!!
1) Write a loop that displays all possible combinations of two letters where the letters are 'a', or 'b', or 'c', or 'd', or 'e'. The combinations should be displayed in ascending alphabetical order:
aa ab ac ad ae ba bb ... ee
2)Write a loop that reads positive integers from standard input and that terminates when it reads an integer that is not positive. After the loop terminates, it prints out, on a line by itself, the sum of all the even integers read
3)Write a loop that reads positive integers from standard input, printing out those values that are greater than 100, each on a separate line, The loop terminates when it reads an integer that is not positive.
4)Given the lists list1 and list2, not necessarily of the same length, create a new list consisting of alternating elements of list1 and list2 (that is, the first element of list1 followed by the first element of list2, followed by the second element of list1, followed by the second element of list2, and so on. Once the end of either list is reached, no additional elements are added. For example, if list1 contained [1, 2, 3] and list2 contained [4, 5, 6, 7, 8], then the new list should contain [1, 4, 2, 5, 3, 6]. Associate the new list with the variable list3.